Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e73b9b0355dd3ec…

MALICIOUS

PDF

38.7 KB Created: 2020-10-02 16:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7fb64f5211d7526bf31a9b1567854113 SHA-1: 7ed0c72b5559482be7c69f6f452b297975f91830 SHA-256: 0e73b9b0355dd3ecbd68f34c1d92e59e3e77661eb1aa746839bda8845ecc1b62
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=jadual+caruman+kwsp+2020+pdf In PDF document text
    • https://site-1038344.mozfiles.com/files/1038344/tokenidosusasudo.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/92657971330.pdfIn PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/65659227940.pdfIn PDF document text
    • http://files.897788976207812023.com/uploads/1/3/1/3/131383575/f4516abe7e4d1c3.pdfIn PDF document text
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/4/131455956/puziwoxem.pdfIn PDF document text
    • http://files.doncavarchi.com/uploads/1/3/1/4/131437380/6450612.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/30481882863.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/73874481829.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/digibufip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9453/5072/files/electricity_worksheet_2_-_voltage_current_and_resistance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/juan_carlos_aguirre_conesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/dragon_ball_devolution_hacked_free_games.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F2 5720 bytes
SHA-256: 46baa98c04285d35df1f74ba72023ece549565e71ad8f6bc762e64065fcc243d
font_01_sfnt_off00006974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 10792 bytes
SHA-256: a0d2f75131c227e548dd6115467227c961e40dfc0666186bc0d2856be23d8611